Against such a small stack you either have to shove it preflop or just fold, according to the 3bet stat, I'd prefer to fold, although you don't have a lot of hands on him. Still see folding as a better option and see how does he continue, unless you have seen him doing such moves more often on the table and he seemed to be like a maniac, then you can also shove preflop. On flop it's pretty standard fold.